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Mathematics
Mathematics
Problem
If
a
=
2
i
^
−
j
^
+
2
k
^
\mathbf{a} = 2\hat{i} - \hat{j} + 2\hat{k}
a
=
2
i
^
−
j
^
+
2
k
^
and
b
=
−
i
^
+
j
^
−
k
^
\mathbf{b} = -\hat{i} + \hat{j} - \hat{k}
b
=
−
i
^
+
j
^
−
k
^
, then find
a
+
b
\mathbf{a} + \mathbf{b}
a
+
b
. Also, find a unit vector along
a
+
b
\mathbf{a} + \mathbf{b}
a
+
b
.
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